WIKA TR12 Serie Manual De Instrucciones página 19

4. Special conditions for use (X conditions)
9) Accessible parts of metallic enclosures which are not connected to ground and
accessible parts of metallic enclosures which are connected to ground but do
not comply to clause 6.5 of IEC/EN 60079-11, shall comply with clause 7.5 of
IEC/EN 60079-0 or have a corresponding warning marking.
10) In case it is impracticable to include the ambient temperature range within the
marking of the instrument, because the instrument is a small instrument according
to 29.10 of IEC/EN 60079-0, the ambient temperature range shall be specified in the
supplied manual. If the instrument is not a small instrument according to 29.10 of
IEC/EN 60079-0 and the ambient temperature range is not included within the marking,
the marking shall additionally include an advisory marking referring to the supplied
manual.
Protective measures for applications that require EPL Ga or Da:
Operationally based friction or impacts between light metal instrument components or their
alloys (e.g. aluminium, magnesium, titanium or zirconium) and instrument components
from iron/steel, are not permitted. Operationally based friction or impacts between light
metals are permitted.
WIKA additional information TR12/TC12, intrinsically safe designs (Ex i)
EN
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